Architecture (no, not the x86 kind)

I'm making a Left 4 Dead 2 map. Because I felt like it. Today, I built the skybox. If you know how Source Engine skyboxes work, skip the next paragraph.

Source Engine maps are split up into two parts: a 1:1 scale playing area, which is detailed but small; and a 1:16 scale skybox which has much less detail, but can be very large. How large? The citadel from Half-Life 2 is 8431 feet tall. That's over a mile for those of you who are bad at math. The skybox is not accessed directly by the player, but polygons with the texture tools/toolsskybox are replaced with a view from the player's location in the skybox (divide by 16, shift to the sky_camera entity).

Here's my skybox:

That makes the view from the zombie-only rooftop in the first area look like this:

The zombie-only area about halfway through the map has this view:

However, the human players will not be able to access those areas. Instead, this is what they'd see from the starting area:

And halfway through:

How can I modify the structure of the building to make the human view more interesting?

So you're asking how to make it so people in a warehouse with no windows can see the detailed skybox?

I think the answer is: "they won't be able to". You can add a glass ceiling but, 1) modern warehouses don't have those so it'd have to be historical, and 2) they still won't be able to see anything other than the sky. So all those textures buildings go to waste.

I would also like to know why everything has a subtle white aura. That's gotta be some shader crudeness.

I once saw a playthrough of Deus Ex HR with some kind of ambient occlusion-simulating shader active, and it looked really wonky in lots of places, like for example a blurry shadow suspended a bit off the floor behind the leg of a chair.

But I suppose without it, it would all look super flat, like how I played it because of my hardware or DX or whatever.

So you're asking how to make it so people in a warehouse with no windows can see the detailed skybox?

I think the answer is: "they won't be able to". You can add a glass ceiling but, 1) modern warehouses don't have those so it'd have to be historical, and 2) they still won't be able to see anything other than the sky. So all those textures buildings go to waste.